Bird

Sulawesi Hornbill

Rhabdotorrhinus exarhatus

Also known as Sulawesi Tarictic Hornbill, Temminck's Hornbill, Sulawesi Dwarf Hornbill

Sulawesi hornbills travel through primary rainforest canopies in tight family groups of up to eight individuals, chattering with sharp, nasal yelps. Unlike many solitary hornbills, they practice cooperative breeding, where non-breeding helpers assist the dominant pair with feeding and nest defense. Nesting females wall themselves inside large tree cavities with mud and feces, leaving only a narrow vertical slit through which the male and helpers pass fruit and insects.

Canopy DwellingFrugivoreCooperative Breeder

—observations

—countries

—peak records

VulnerableConservation status

Key facts

Diet & preyStrangler figs, Stick insects, Tree geckos

Predators

Sulawesi palm civet
Reticulated python
Black eagle

ThreatsDeforestation, logging of nesting trees, and hunting

HabitatsLowland and hill tropical moist rainforests

Life span15–20 years

Classification

FamilyBucerotidae
SpeciesRhabdotorrhinus exarhatus

Range & activity

Range data is not available yet.

Safe observation

Interaction riskLow

Low
Moderate
High
Very high

Why interaction risk is low: Safe to observe at a normal distance.
What to notice: Look for a small black hornbill with a pale, grooved casque; males have a bright yellow face and throat, while females are all black.
Support conservation: Observe silently through binoculars from forest trails and never play recorded calls near suspected nesting hollows.

Responsible observation

Sound cues: Listen for distinctive nasal honks and chuckles echoing from the subcanopy.
Fruiting trees: Watch large strangler figs early in the morning when family groups gather to forage.
Nesting sensitivity: Keep a respectful distance from large dead or hollow trees during the dry breeding season.

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